Gas coolers are used in gas analysis to lower the dew point of humid samples to avoid condensate in the analyser. An extremely stable gas dew point avoids water vapour cross sensitivity and volumetric errors. The electronically controlled peltier cooler produced by M&C incorporates the “Jet-Stream” design of heat exchanger. This design induces condensate formation and guarantees optimum dew point reduction to a stable low value, eliminating the need for additional pre-drainage devices.